The probe arm now has 3 supports for proper rigidity. I've turned the acceleration of the motors down a bit and we'll see how much less wobble there is during movement.

You can see my crude attachment system for the hypodermic needle that allows me to change angles and swap tips. I will be mounting the micron tips inside hypodermic needles for support, and to allow me to bend them at angles.

Once I've got the delta software sufficiently smoothed I might try putting Sharpie on a slide and tracing a few tracks in it to see what we get. That might help with calibration later too.

Yes, all this stuff is not good for accuracy. I know. However it is damned convenient for development. A "proper" prototype won't have all the bendy wirey bits.